Keystones — Lintel
Five GCSE retrieval questions · 28 June 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0086 in standard form
Answer: 8.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 8
Answer: (x + 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 15.cm -
4. Ratio Mixed ratio problems
Simplify: 8:4:6
Answer: 4:2:3 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 48, 27, 17, what is the missing number?
Answer: 36